The history of what are now known as the Czech lands (Czech: esk zem) is very diverse. These lands have changed hands many times, and have been known by a variety of different names. Up until the fall of the Austro-Hungarian Monarchy after the First World War, the lands were known as the lands of the Bohemian Crown and formed a constituent state of that empire: the Kingdom of Bohemia (in Czech: "Krlovstv esk", the word "Bohemia" is a Latin term for echy).
Prior to the Battle of Mohcs, the Kingdom was an independent state within the Holy Roman Empire. After that battle the Lands of the Bohemian Crown were incorporated into the Austrian Empire, and later into the aforementioned Austro-Hungarian Monarchy.
They came to be known as the Czech lands after the fall of the Empire, and the rise of the First Czechoslovak Republic, when the term Bohemia (Czech: echy), which also refers to the core region of the former kingdom, was no longer deemed acceptable by those in Moravia and Czech Silesia (historically, other two core lands of the Bohemian Crown). These three integral Czech lands (Bohemia, Moravia and Czech Silesia) now form the boundaries of the Czech Republic.